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A comment on Photocatalyst splits water into H and O2 at quantum efficiency near 100%. Parent comment

Re:Photocatalyst splits water into H and O2 at quantum effic... by dmead on Saturday December 26, 2020 @01:42PM (#25545404)
most of the universe is hydrogen. it's easier for a base on some other planet to find hydrogen than set up a battery factory.
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Re:Photocatalyst splits water into H and O2 at quantum effic... by mr_toad on Saturday December 26, 2020 @05:18PM (#25546876)
Hydrogen is abundant in gas clouds, in Stars, and gas giants.

But unbound molecular hydrogen (H2) is basically nonexistent on terrestrial planets since their gravity is insufficient to hold onto it.

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